I have a quick question for a problem I am solving:
I am solving a non-linear system of $4$ equations with $4$ variables, and after brute expansion I have deduced that there are $24$ solutions (but only one set of unique values which can be changed to make different solutions). But I am wondering if there is a faster way for non-linear simultaneous equations to determine the number of solutions there are - is there a set for only a certain number of solutions, no solutions, infinite solutions, etc.
Any help is appreciated.